/** @file

  Copyright (c) 2004  - 2019, Intel Corporation. All rights reserved.<BR>

  SPDX-License-Identifier: BSD-2-Clause-Patent

Module Name:


  IchRegTable.c

Abstract:

  Register initialization table for Ich.



--*/

#include <Library/EfiRegTableLib.h>
#include "PlatformDxe.h"
extern EFI_PLATFORM_INFO_HOB      mPlatformInfo;

#define R_EFI_PCI_SVID 0x2C

EFI_REG_TABLE mSubsystemIdRegs [] = {

  //
  // Program SVID and SID for PCI devices.
  // Combine two 16 bit PCI_WRITE into one 32 bit PCI_WRITE in order to boost performance
  //
  PCI_WRITE (
      MC_BUS, MC_DEV, MC_FUN, R_EFI_PCI_SVID, EfiPciWidthUint32,
      V_PCH_DEFAULT_SVID_SID, OPCODE_FLAG_S3SAVE
    ),

  PCI_WRITE (
      IGD_BUS, IGD_DEV, IGD_FUN_0, R_EFI_PCI_SVID, EfiPciWidthUint32,
      V_PCH_DEFAULT_SVID_SID, OPCODE_FLAG_S3SAVE
    ),

  PCI_WRITE(
      DEFAULT_PCI_BUS_NUMBER_PCH, 0, 0, R_EFI_PCI_SVID, EfiPciWidthUint32,
      V_PCH_DEFAULT_SVID_SID, OPCODE_FLAG_S3SAVE
    ),
  PCI_WRITE (
      DEFAULT_PCI_BUS_NUMBER_PCH, PCI_DEVICE_NUMBER_PCH_LPC, PCI_FUNCTION_NUMBER_PCH_LPC, R_PCH_LPC_SS, EfiPciWidthUint32,
      V_PCH_DEFAULT_SVID_SID, OPCODE_FLAG_S3SAVE
    ),
  PCI_WRITE (
      DEFAULT_PCI_BUS_NUMBER_PCH, PCI_DEVICE_NUMBER_PCH_SATA, PCI_FUNCTION_NUMBER_PCH_SATA, R_PCH_SATA_SS, EfiPciWidthUint32,
      V_PCH_DEFAULT_SVID_SID, OPCODE_FLAG_S3SAVE
    ),
  PCI_WRITE (
      DEFAULT_PCI_BUS_NUMBER_PCH, PCI_DEVICE_NUMBER_PCH_SMBUS, PCI_FUNCTION_NUMBER_PCH_SMBUS, R_PCH_SMBUS_SVID, EfiPciWidthUint32,
      V_PCH_DEFAULT_SVID_SID, OPCODE_FLAG_S3SAVE
    ),
  PCI_WRITE (
      DEFAULT_PCI_BUS_NUMBER_PCH, PCI_DEVICE_NUMBER_PCH_USB, PCI_FUNCTION_NUMBER_PCH_EHCI, R_PCH_EHCI_SVID, EfiPciWidthUint32,
      V_PCH_DEFAULT_SVID_SID, OPCODE_FLAG_S3SAVE
    ),
  PCI_WRITE (
      DEFAULT_PCI_BUS_NUMBER_PCH, PCI_DEVICE_NUMBER_PCH_PCIE_ROOT_PORTS, PCI_FUNCTION_NUMBER_PCH_PCIE_ROOT_PORT_1, R_PCH_PCIE_SVID, EfiPciWidthUint32,
      V_PCH_DEFAULT_SVID_SID, OPCODE_FLAG_S3SAVE
    ),
  PCI_WRITE (
      DEFAULT_PCI_BUS_NUMBER_PCH, PCI_DEVICE_NUMBER_PCH_PCIE_ROOT_PORTS, PCI_FUNCTION_NUMBER_PCH_PCIE_ROOT_PORT_2, R_PCH_PCIE_SVID, EfiPciWidthUint32,
      V_PCH_DEFAULT_SVID_SID, OPCODE_FLAG_S3SAVE
    ),
  PCI_WRITE (
      DEFAULT_PCI_BUS_NUMBER_PCH, PCI_DEVICE_NUMBER_PCH_PCIE_ROOT_PORTS, PCI_FUNCTION_NUMBER_PCH_PCIE_ROOT_PORT_3, R_PCH_PCIE_SVID, EfiPciWidthUint32,
      V_PCH_DEFAULT_SVID_SID, OPCODE_FLAG_S3SAVE
    ),
  PCI_WRITE (
      DEFAULT_PCI_BUS_NUMBER_PCH, PCI_DEVICE_NUMBER_PCH_PCIE_ROOT_PORTS, PCI_FUNCTION_NUMBER_PCH_PCIE_ROOT_PORT_4, R_PCH_PCIE_SVID, EfiPciWidthUint32,
      V_PCH_DEFAULT_SVID_SID, OPCODE_FLAG_S3SAVE
    ),
  TERMINATE_TABLE
};

/**
  Updates the mSubsystemIdRegs table, and processes it.  This should program
  the Subsystem Vendor and Device IDs.

  @retval Returns  VOID

**/
VOID
InitializeSubsystemIds (
  )
{

  EFI_REG_TABLE *RegTablePtr;
  UINT32 SubsystemVidDid;

  SubsystemVidDid = mPlatformInfo.SsidSvid;

  RegTablePtr = mSubsystemIdRegs;

  //
  // While we are not at the end of the table
  //
  while (RegTablePtr->Generic.OpCode != OP_TERMINATE_TABLE) {
  	//
    // If the data to write is the original SSID
    //
    if (RegTablePtr->PciWrite.Data ==
          ((V_PCH_DEFAULT_SID << 16) |
           V_PCH_INTEL_VENDOR_ID)
       ) {

    	//
      // Then overwrite it to use the alternate SSID
      //
      RegTablePtr->PciWrite.Data = SubsystemVidDid;
    }

    //
    // Go to next table entry
    //
    RegTablePtr++;
    }

  RegTablePtr = mSubsystemIdRegs;


  //
  // Program the SSVID/SSDID
  //
  ProcessRegTablePci (mSubsystemIdRegs, mPciRootBridgeIo);

}
